Intertextual Connection between the words of Alma the Younger and Abinadi

In an earlier post, I discuss the topic of the first resurrection in the Book of Mormon and how it is only discussed by three men--Abinadi, Alma-1, and Alma-2.

As if to underscore the point, I noticed that Alma-2 paraphrases Abinadi in his discussion of the topic. Compare Alma 40:16

16 And behold, again it hath been spoken, that there is a first resurrection, a resurrection of all those who have been, or who are, or who shall be, down to the resurrection of Christ from the dead.

and Mosiah 15:21

21 And there cometh a resurrection, even a first resurrection; yea, even a resurrection of those that have been, and who are, and who shall be, even until the resurrection of Christ—for so shall he be called.